expr.c (expand_expr_real_1): Use get_callee_fndecl instead of checking CALL_EXPR_FN directly to test for...
* expr.c (expand_expr_real_1) <case CALL_EXPR>: Use get_callee_fndecl
instead of checking CALL_EXPR_FN directly to test for builtins.
If error or warning attributes are present, print
error resp. warning.
* c-common.c (handle_error_attribute): New function.
(c_common_attribute_table): Add error and warning
attributes.
* doc/extend.texi: Document error and warning attributes.
* gcc.dg/va-arg-pack-len-1.c: Use error and warning
attributes.
* gcc.dg/va-arg-pack-len-2.c: New test.
* g++.dg/ext/va-arg-pack-len-1.C: Use error and warning
attributes.
* g++.dg/ext/va-arg-pack-len-2.C: New test.
From-SVN: r128687
